Type-writer.



C. J. PAULSON. TYPE WRITER.

APPLIUATION rum) 15:13.20, 1911.

1,025,204, Patented May 7, 1912.

I I vento'r:

by Am UNITED STATES -PATENT OFFICE.

CHARLES J. rau nson, or BROOKLYN, NEW YORK, ASSIGNOR, BY MEsNn ASSIGNMENTS,

TQSEERLING TYPEWRIIER COMPANY, A CORPORATION OF NEW JERSEY.

TYPE-WRITER.

Specification of Letters Patent.

Patented May *7, 1912.

To all whom it may concern Be it known that I, CHARLES J. PAULson, a subject of the King of Sweden, and res;-

'- dent of the borough of Brooklyn, in the county of Kings'and State of New York,'

have invented certain new and useful Improvements in Type-Writers, of which the following isa specification.

This invention relates to typewriting machines wherein a spring actuated hammer is caused to strike against an impression with a-portion of the mechanism missing.

Fig. 4:: is .a detail of the hammer with its engaging and releasing trigger.

The hammer, as l is here shown as a curved bar, its upper, forward portion being adapted to strike an impression surface in the manner and for the purposes known in this art. The lower end of the hammer is pivoted, as at 2, in a base or frame portion 3, said hammer being adapted to swing about said pivot in the are covering its operative range. -Also pivotally supported about the same axis is an arm 4:, said arm extending forwardly and having upon its pivotal end, a threaded boss, 5, containing a horizontal, threaded member 6. A helical spring 7 connects said threaded member 6 with a threaded member 8 which latter is pivotally supported in a sleeve 9, which by means of a boss 10, on its upper side is pivotally carried bya threaded member 11, that is vertically and adjustably held by a threaded boss 12, extending from the hammer. A slotted plate 13' depends from the lowergside of sleeve 9, the slot receiving a set screw 14, which is inserted in the ham- Iner. .Thus upon releasing said set screw and turning threaded member .11, the sleeve 9 is adjusted vertically thereby regulating the tension of spin 7.

The lower end of hammer 1 is provided with a tooth 15 which is normally in en gagement with a notch in a pawl 16 which 'is pivoted at 16 to the base, and is held in -Said bar 18 carries a finger 20 which extends over the arm 4: and pawl 16, depress ing said members in succession in its downward path, due to their being in different horizontal planes. The bar 18 also carries a spring finger 21 which lies against and beneath the arm 4,;the function of said finger 21 being to raise arm twith/the automatic return of bar 18. j

A pin or the like 22, attached to a spur 23 on hammer 1, isbent to lie horizon tally across the upper surface of arm 4, serving.

in the return movement'of said arm, to, communicate said movement to said hammer.

The operation of my improved hammer action is as follows: Upon depressing-a finger key, the bar 18 is moved downwardly its finger 20 carrying with it the arm 4:, whose downward travel extends spring. 7,

' increasing the tension of said spring, and

thus storing up energy with which to proect the hammer. In the course of its downward movement the finger 20 reaches and depresses the pawl 16, disengaging the lat ter from the tooth 15 of the hammer. When thus released, the hammer under the influence of spring 7, is projected forwardly in the performance of its function. The transverse bar 18, is then returned automatically,

the influence of spring 21 causing finger 21 to elevate arm 1, which, in turn engages pin 22 and causes the latter to return the hammer to its normal position in readiness for a new impact. At'the same time spring 17 returns pawl 16 into its position of engage,

ment with tooth 15 of the hammer.

.In order to set the tension of spring 7 to a suitable degree, set screw 14 is loosened and threaded member 11 is turned within its boss 10, thus raising or lowering threaded member 8 to the desired position. When thus set the strength of spring 7 can be regulated at will according to the character of thework to be performed, to render the tension of the hammer suitable for light work or for manifolding. To this end the threaded member 8 is turned in its sleeve 9, this act causing spring 7 which is engaged in the thread of member 8, to'travel along said member in either direction.

If the spring is moved outwardly its tension is increased or if it is moved inwardly, the tension is lessened. In this manner the force of impact of the hammer can be regulated to a nicety.

I claim:

1. In a device of the character described a pivoted hammer having a threaded boss, an arm pivoted to the hammer pivot, said arm having a threaded boss, a horizontal threaded member in said boss, a vertical threaded member working in the boss on said hammer, a sleeve supported by said vertical threaded. member, a horizontal threaded member working in said sleeve and a coil spring connected at opposite ends to said horizontal threaded members, and means for rocking said arm.

2. In a typewriter hammer operating means, a base, a hammer pivoted to said base, a sleeve carrying a threaded member, a second threaded member adjustably mounted on said hammer, said second threaded member forminga support for said sleeve, a pivoted arm having a threaded boss, a horizontal threaded member in said boss and a tension spring connected to the threaded member in said sleeve and to the threaded member in said boss.

3. In a typewriter hammer operating means, a base, a hammer pivoted in said base, a sleeve carrying a threaded member, said sleeve being connected to said hammer, a second threaded member forming a support for said sleeve, a coil spring connected at one end to the threaded member-carried by said sleeve, one end of said spring being adapted to travel along the thread thereof when said threaded member is rotated.

4. In a typewriter hammer operating means, a base, a hammer having a pivot in said base, an arm on said pivot,'a pin on said hammer bearing against the upper end of said arm, a coil spring connected to said arm and said hammer, a notched pawl in said .base normally engaging the lower end of said hammer, a spring bearing against the lowerend of said notched pawl, a pivoted transverse member having a plurality of fingers, one of said fingers being adapted to successively engage said arm and pawl, and means for actuating said pivoted transverse member. I

5. In a typewriter hammer operating means, a pivoted hammer, an inclined member carried by said hammer, a tension spring, and means for causing one end of said spring to travel along said inclined member.

6. In a. typewriter hammer operating means, a pivoted hammer havinga threaded boss, an inclined transversely extending threaded member vertically adjustably supported in said boss, a tension spring connected at one end to said threaded member and means for rotating said thr aided member to cause said spring to travel along the threads on said threaded member.

7. In a typewriter hammer operating means, a pivoted hammer, a pivoted pawl normally engaging said hammer, a pivotal arm,

a tension spring connecting said arm with said hammer, a pin on said hannner in engagement with said arm, a pivoted t'ansverse member, fingers carried by said transverse member, one of said fingers being adapted to successively engage said, arm and said pawl during the downward movement of said transverse member, and the other of said fingers being adapted to engage said arm to return said hammer to its normal position during the upward movement of said transverse member, and means for actuating said transverse member.

Signed at New York, in the county of New York and State of New York, this 17th day of January, A. D. 1911.

CHARLES J. IAULSON.

Witnesses FIH'ZDERHK (l. BONNY, I IV. BARKER. 

